Full Description

This International Standard specifies the special tolerances to be applied to the diameter of the cutting portion of the hand and machine reamers covered by ISO/R 236, Hand reamers and long fluted machine reamers, Morse taper shank, and ISO/R 521, Machine chucking reamers with parallel shanks or Morse taper shanks, when a grade of accuracy other than the standard stock grade (with m6 tolerance) provided for in these ISO Recommendations is required.